Medway · England
Gadshill External Mastic
We cover Gadshill for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
Gadshill questions
Is Gadshill in your area for external mastic?
Yes, Gadshill is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Is Gadshill within the area you cover?
Yes, Gadshill is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away and have them redone then.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we’re using and why.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Pointing it stops it working. A flexible sealant is the right fill.
External mastic in Gadshill
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. If you are dealing with cracked joints where brick meets render or frames and sealant that has lost its bond to the brick or render, we can help.
Somewhere as small as Gadshill, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, in Gadshill and everywhere else we cover.
- Location
- Gadshill (ME3)
- Wider area
- Medway
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Gadshill
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- When we can work, for business premises
- The product the joint needs
- The size of the job
Doing several joints on one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Asking for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- How many joints, rooms or windows are involved
- The address or postcode of the job
- Whether it’s a home or a business
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Leave the joints unpainted unless we’ve said otherwise
- Fix overflowing gutters above sealed joints
- Get split or bare joints resealed while the damage is small
- Walk round the building once a year and look at the joints
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere as small as Gadshill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
How to get a quote
For external mastic in Gadshill, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Gadshill, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
Why us?
- Sealant colour chosen to suit
- Any old sealant cut out fully, not covered over
- Fully insured
- Colour agreed with you before any work starts
Towns and villages near Gadshill
Also in Gadshill
What we’re called out for in Gadshill
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
It’s worth asking for a quote if you see:
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
- Movement joints with cracked, split or missing sealant
Managing a site like Strood Academy? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before you book anyone
- How long the guarantee is
- What the cure time is
- Which sealant they’ll use, and why
- Are they insured?
Gadshill buildings and the weather
With historic houses such as Temple Manor (about 1.9 miles south-east) nearby, there’s older building stock in the area around Gadshill as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Higham station, split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Church of St John, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Gadshill is about 2 miles north-west of Rochester, in Medway. Jobs in Gadshill get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Gadshill is one of 68 towns and villages in Medway we cover for external mastic. Chelmsford is on our list too, around 23 miles away.
Every address in ME3 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Copperfield Crescent, Charles Dickens Avenue and Gravesend Road or anywhere close by, we can help. Neighbouring places we cover for external mastic include Higham (1 mile north), Shorne Ridgeway (1 mile west), Shorne (1 mile west), Lower Higham (1 mile north) and Mockbeggar (2 miles north-east). Larger places within reach include Gillingham (6 miles south-east), Chatham (5 miles south-east), Rainham (7 miles south-east), Luton (4 miles south-east), Park Wood (7 miles south-east) and Lordswood (6 miles south-east).
Landmarks near Gadshill
We work in homes and buildings around Rede Common, Temple School and Sir John Falstaff Public House and the streets around them. Gadshill’s nearest station is Higham station, roughly 1.2 miles north. Other landmarks nearby include Rochester Castle (2.2 miles south-east) and French Hospital (2.4 miles south-east). For a walk, there’s Gad's Hill and Rede Common.
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.